bugfix: yarn仓库镜像，点击切换回原生时，原生按钮不亮的问题修复

packages/core/src/modules/plugin/node/config.js

@@ -11,7 +11,7 @@ module.exports = {
     cafile: false,
     NODE_EXTRA_CA_CERTS: false,
     NODE_TLS_REJECT_UNAUTHORIZED: false,
-    yarnRegistry: undefined,
+    yarnRegistry: 'null',
     registry: 'https://registry.npmjs.org'// 可以选择切换官方或者淘宝镜像
   },
   // intercepts: {

packages/core/src/modules/plugin/node/index.js

@@ -44,7 +44,7 @@ const NodePlugin = function (context) {
 
       const cmds = []
       for (const item of list) {
-        if (item.value != null) {
+        if (item.value != null && item.value.length > 0 && item.value !== 'null') {
           cmds.push(`${command} config set ${item.key}  ${item.value}`)
         } else {
           cmds.push(`${command} config delete ${item.key}`)
@@ -67,7 +67,7 @@ const NodePlugin = function (context) {
       const cmds = []
       log.debug('yarn set:', JSON.stringify(list))
       for (const item of list) {
-        if (item.value != null) {
+        if (item.value != null && item.value.length > 0 && item.value !== 'null') {
           cmds.push(`yarn config set ${item.key}  ${item.value}`)
         } else {
           cmds.push(`yarn config delete ${item.key}`)

packages/core/start/user_config.json5

@@ -8,7 +8,7 @@
   plugin: {
     node: {
       setting: {
-        yarnRegistry: null,
+        yarnRegistry: 'null',
       },
     },
     git: {

packages/gui/src/view/pages/plugin/node.vue

@@ -44,8 +44,8 @@
         </a-form-item>
 
         <a-form-item label="yarn仓库镜像" :label-col="labelCol" :wrapper-col="wrapperCol">
-          <a-radio-group v-model="config.plugin.node.setting.yarnRegistry" :default-value="null"  @change="onSwitchYarnRegistry" button-style="solid">
-            <a-radio-button :value="null">
+          <a-radio-group v-model="config.plugin.node.setting.yarnRegistry" :default-value="'null'" @change="onSwitchYarnRegistry" button-style="solid">
+            <a-radio-button :value="'null'">
               yarn原生
             </a-radio-button>
             <a-radio-button value="https://registry.npmmirror.com">